TY - BOOK AU - Lipschutz Seymour AU - Lipson Marc-Lard TI - Discrete mathematics T2 - Schaums Outlines SN - 6070601747 (ppk) U1 - B271, N7-;2 PY - 1997/// CY - New York McGraw Hill Companies,Inc. KW - Set theory N1 - Index-I.4 ER -